Loom shuttle



LOOM SHUTTLE Nov., 23, 1937 Filed May 25' 1954 Patented Nov. 23, 1937 vLooM SHUTTLE Y Y James iT.' C'uboy, Southbridge, LMass., 'assigner .5to AlbrtE. Leon, Belmont,

I Animation Mayes, 1934, sexiaglNq. 72,145.8

SiCllaims.` (Cl. 139-5223) eration or s1f0hreadirig- Nw lirrilarsiiiiicii @5.11: wes not practicdbleltdcast threalderblocks wich ,the overhead or loyerliehgi ngel13hreafdingl members oifze'rlying:v ,otherfparts v.of the shuttle, A it was the practice to .make theythreader block castingsof `relallah/ely-soft alloys :ofbrass1ror bronze,` which "co'ld' be cast'in `operi or r distoriged form ehdthen bent fliinder v,pressure to V`gix're vtheY .desired :ovjerf' hangingl relationshipofl paris `or tit was riecessery be makethe'threadr" brinSrt'eZd-@S e Separeterwe.

Lel cesti` Ioriri to rit ed ermuntern a threder block'illustrated inthe previous gures `.eps viewed from tlief-ls1deopposilaeithe thread eye ofthe shuttle,

-FigJ-L'? is a igerspective,yewshowingthe' threader and ldeuveryeye LFig.' 8 isl perspective vyiew'from ithe' outside showing-,the irriprovedldlyeryeye.

, As shown in Fig. lithefixeielit;.of the ,shuttle body-LLA iss'uitahly recessed oreal; awaly, .asshown anni', A2,'fprward1jofth bobbm chamber 1a:A for l5 the receptionlof' the `i',hrea,r.fl ,e block or casting con- `taining the A,sicres'erit improvements. On the left Asie@ .lof the shuttle j'roregart i rias: the lsim001eis Yiewedifrem thefro? end) ierrovi'dedelaterall fol let opening'or pssage'iri whichlis ys hown'ir'i-.520 vsevrteelsa. novel forni o fldelivery ey,'pres`en01y 0g be described, and ifo The threader casting or block, ca st in a single piece sghstanpiallyin fthejform shown in Fig; y4,(25 "may, forv purposesjof description, `beregarded es`` eomprisingV anioblong besepo'rtion or member. `l

preferably of Yapproj;iijngiijlelyv rectangular form, `andsuperpos,edfon or carried by tlievvrearwarclpo'- tion Qof moiety Y ofirhis base vis an apprcximeinem i l3o qlladrentrfshapedriilernbe 2, whosegcurved or cnyex; approxirhlately'farciiate s iyir age aj; Zanextends and Adown fno ythe topfof ,theoppsite side .of the bese for the purpose of'prcvvidingan arched ,roofrng or bridge member agbovejthe hesjearidOverhlngllgQ the rearward portion of the bese. The lower edge of this bridgemember at `Zateririirietes"'slightly '.'irifside the djacentsideface o fjlshe'zbaseffand isV preferably inclined slight-,lyforwardly and inward- 40 ly in relation to that side of the base.

`Sornewl'iel; Vin faidvance of `the., lower side-of, theV bridge member Zfanfd spacedftherefro/m-is anup- `esl: 'the lsndtple, ,dame-ry, ,eye there 'is Vformed an l 'elevated yarnglidine beak 114 .ofl approximately I triangular .,form,as shown," whose .top fce isconl,vexly Vcurved land which has its i11`neredg-e. 51 and "its outeredlg ,6,as viewed'in'plen, eOnVergfi`1'1,fg,f;tola.y 50, downwardly., projecting [tip 1 lying fin al Vertical "planev Yso other side by the upright guide member 3. The.

foregoing description of the threader block applies to the casting in its unfinished form'.V Toflt the casting forthe reception and retention of the yarn the bridge or quadrant shaped member is bored longitudinally and medially of the block, preferably with a slight upward and'forward inclination corresponding to the inclination given the base at the open side of the block, as shown in Fig.'5. "The longitudinal medial bore II may have its rear end countersunk or4 flared slightly to ao- `commodate ballooning yarn. The rear facie, of the bridge member is forwardly curved asshown at- I2 to present a roundcorner for the entrance of the yarn. To provide an'inlet passage for the yarn, I cut with any suitable cutter, such as a Asmall thin milling tool, a longitudinal slot I3 severing the lower portion of the' bridge `from the upper surface of the base so that the lower edge of the bridge overhangs 'the underneath face of the base but is separatedtherefrom by a narrow longitudinal slot into which the yarn is guided in the threading operation by engagement with the forwardly disposed upright guide Y37,7`which tends y to guide the yarn inwardly `in conjunction with -the whirling motion 'of the'yarn caused'by'its ballooning when` Yunwi'nding. The slot'is longer than the bore diameter. i l

It, will therefore be seen that the rear portion of the block is provided with Va longitudinal cylindrical bore forming the rear part of a medial thread passage, whose front part is formed by the open trough between the two upright' members 3 and 9. Since this passage is slightly upwardly in clined, the thread issues from its forward end somewhat above the level of the notch Bb atthe bottom of thehorn. Of 4course the partsV are smoothly finished by any suitable buing or polishing operation to provide smooth surfaces for Contact with Vthe yarn and if madeofbast iron the metal may be subjected to' any well known 'rust proofing treatment to avoid rust or corrosion.

The base member is provided with the customary transverse bolt orifice, as shown at I4,V for anchoring it in place.

The form of threader above desoribedis one that is intended for use on a normally wound bobbin in which the yarn is coiled on the bobbin in a counterolockwise direction, as viewed from the forward end of the bobbin. However, Vthe same principle is applicable to a bobbin having the so-called reverse wind and that form o-f threader is shown inA Fig. .6. In this form the bridge member I5 curves downwardly to the delivery side of the block from the opposite side so as to bridge over the rear and the late-ral inlet slot I 6 is cut through the delivery side ofthe rear portion of the block into the medial cylindri- Vcal bore. In this case the web I`I,'which supports the forward guiding beak 4II, forms the guide that is inwardly oifsetfrom the edge' I5av of the bridge Yto assist in. threading the yarn into thev medial thread passage just as the inwardly offset guide 3 in the first-described form functions to assist the threading operation and also to prevent the unthreading.

The longitudinal dimension or length of the bridge member along the inlet slot serves asa very reliable means of preventing the unthreading of the yarn in the case of a loop in the yarn being overcast by the sudden arrest of the shuttle movement in the shuttle blocks at its forward end and prevents all possibility of such loops being caught around the bridge member. The convex rear end of the bridge member serves to facilitate the guiding of the yarn into the bore, since there is no obstruction to the free entrance of the yarn into the rear end of the cylindrical bore, while the forward guide member 3 serves to direct the yarn inwardly in aid of the threading operation. The rear end of the threader receiving recess A may be made somewhat narrower than the width of the threader block to form a vthroatforV limiting the lateral movement of Ythe fyarngwhile also forming positioning and supporting ledges at'the'rear Yof Vthe'thread block,` as shown at I9. K Since'all parts of the threaderl block' areV cas in one piece, it is not possible for any'part to work loose orget out of the precise position which is necessary for efficient and reliable operation and since no bending or distortion of any part of the casting'is Vnecessary to giveeit lthe proper form and relationshipl off-parts', itV is'perfectly feasible to make acne-piece cast metal threader uof harder and more rigid material than was possible under previous methods of manufacture t..

while producing aV threader that is superior in reyspect to ease and certainty of threading andwat "thesametime wholly freefrom tieing or catching on'the'threader Yand from troubles duehtounthreading when the yarn loops'are'overcast.v

To eliminate unthreading of the yarn Vfrom the delivery eye of the shuttle, I provide'a novel conjstruction of delivery eye,v as illustrated inFig. 1

and Fig. 7 and Fig. 8. This eye may 'be made of a V piece of 'sheet metal or other suitable material,

-jwhich is formed into an approximatelyV U-shaped 7? jloop comprising fthe forward member,` or leg' 20 "and aV rear leg 2| which'are preferably nearer together at their upper ends than at' the closed bottom, so as toV provide an entrance narrower than Y Ythe body portion of the eye. The forward'member 20 is provided witha yarn guiding andretaining finger or spur 22 ,bent rearwardlytooverlap the rear member`2 I 'and lying in aj plane outspace for the yarn to passl into theeye." `The spur 22 has its upper edge downwardly and rearwardly inclined to guide the yarn into the eye and has 'its underneath edgeV concave to guidethe'yarn over the intake and prevent itsescape from thel The width of the eye transversely of the eye. shuttle is dimensioned so that when the eye is inserted with the inside' edge of member 2| abutting against the side face of the threaderblock the whole eye lies somewhat insidev the adjacent outside surface of thewooden shuttle body. The 'l 5 inner edge of the forward member 20 is downwardly and inwardly' curved toguide the yarn easily into the eye. `The wood slightly overhan'gs the upper end of the forward -memberl'toi avoid j thev catching of the'yarn in-Vany opencrackthat".

might be formed at that point.

`-WhatI claim is; 1 Y' i L1A one-tue@ shutue threader ofrigid castV :metal whose rearwardhalf has an upward extension of substantiallyquadrantal'contour trnsl*wardly offset fromsaidrear member to leavea s vide an elongated entrance slot below the transverse diametrical plane of the bore between top and bottom substantially parallel edges inv a tially greater distance thanV the diameter of said Y bore, the forward portion of said base, being formed with a trough-like passage open at its top and forming a continuation of said laterally slotted cylindrical bore, said passage being bounded on one side by an upstanding yarn guiding lug located at the forward end of the base and in forward alignment with, but well spaced from, the forward end of said slot, and an elevated yarn guiding beak bounding the opposite side of said passage and having a convexly curved top converging forwardly to a vertically depending tip located in axial alignment with said bored passage.

2. A one-piece shuttle threader of rigid cast metal whose rearward half has an upward extension of substantially quadrantal contour transversely of the base forming a downwardly curved bridge arching acrossa medial longitudinalcylindrical bore and separated along its lower side from the underneath marginal portion of the base to provide a vertically narrow elongated entrance` forward end of the base and in forward alignment with, but well spaced from, the forward end of said slot, and an elevatedryarn guidingY beak bounding the opposite side of said passage and having a convexly curved top converging forwardly to a vertically depending tip located in axial alignment with said bored passage, the outer y edge of the slot-overhanging portion of said bridge being inclined inwardly in a forward direction to facilitate entrance into the cylindrical passage of the yarnbeing treated.

3. A one-piece shuttle threader of rigid cast metal whose rearward half has an upward extension of substantially quadrantal contour transversely of the base forming a downwardly curved bridge arching across a medial longitudinal cylindrical bore and separated along its lower side below the middle plane of the bore from the underneath marginal portion of the base to provide an elongated entrance slot between top and bottom substantially parallel'edges in a lengthwise direction of the threader for a substantially greater distance than the diameter of said bore, the forward portion of said base being formed with a trough-like passage open at its top and forming a continuation of said laterally slotted cylindrical bore, said passage being bounded on one side by lan yupstanding yarn guiding lug located at the forward end of the base and in forward alignment with, but well spaced from, the forward end of said slot, and an elevated yarn guiding beak bounding the opposite side of said passage and havingv a convexlyV curved top converging forwardly to a vertically depending tip located in axial alignment with said bored passage, the rear end of said bridge member being formed with a convex forwardly curving corner at its bottom to facilitate the entrance of .the subtending portion Y 

